Apparatus and method for recognizing optical information

Details Apparatus and method for recognizing optical information Apparatus and method for recognizing optical information

1986-02-12

1988-03-29

Pitts, Harold I.

Registers

Coded record sensors

Particular sensor structure

235454, G06K 714

Patent

active

047345667

ABSTRACT:
Apparatus and method for recognizing optical information such as bar code has a light source and an image sensor which converts intensity of light reflected by the optical information into an electric image signal. The electric image signal is sample-and-held to detect the average intensity of light from the light source. The time interval for activating the light source is pulse width modulated in accordance with the detected average intensity in a previous operational cycle.

REFERENCES:
patent: 4315245 (1982-02-01), Nakahara
patent: 4356389 (1982-10-01), Quirey

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